How do I build a cable to connect a portable generator to my house electrical system?

When the machines were actually released there was only one version, the 1200XL, an odd hybrid of features from the Sweet 8/16 projects. Notable features were 64kB of RAM (first for an Atari), built-in self test, redesigned keyboard (featuring four function keys and a HELP key), and redesigned cable port layout. However the 1200XL also included a number of missing or poorly implemented features. For instance it included the expansion chassis connector, but the case did not include a hole for it to be used. An improved video circuit provided more chroma for a more colorful image, but the line was not connected to the monitor port. The +12V pin in the SIO port was not used; only +5V power was available. Even the re-arrangement of the ports made some joysticks and cartridges difficult or impossible to use. Changes made to the operating system to support the new hardware resulted in compatibility problems with some older software.